void Knob::mouseMoveEvent ( QMouseEvent *pMouseEvent )
{
if (m_dialMode == QDialMode) {
QDial::mouseMoveEvent(pMouseEvent);
return;
}
if (!m_bMousePressed)
return;
const QPoint& posMouse = pMouseEvent->pos();
int xdelta = posMouse.x() - m_posMouse.x();
int ydelta = posMouse.y() - m_posMouse.y();
float angleDelta = mouseAngle(posMouse) - mouseAngle(m_posMouse);
int iNewValue = sliderPosition();
switch (m_dialMode) {
case LinearMode:
iNewValue = int(m_lastDragValue + xdelta - ydelta);
if (iNewValue > maximum())
iNewValue = maximum();
else
if (iNewValue < minimum())
iNewValue = minimum();
break;
case AngularMode:
default:
// Forget about the drag origin to be robust on full rotations
if (angleDelta > +180.0f) angleDelta = angleDelta - 360.0f;
if (angleDelta < -180.0f) angleDelta = angleDelta + 360.0f;
m_lastDragValue += float(maximum() - minimum()) * angleDelta / 270.0f;
if (m_lastDragValue > float(maximum()))
m_lastDragValue = float(maximum());
if (m_lastDragValue < float(minimum()))
m_lastDragValue = float(minimum());
m_posMouse = posMouse;
iNewValue = int(m_lastDragValue + 0.5f);
break;
}
updatePosition(iNewValue);
}
void Knob::mouseMoveEvent ( QMouseEvent *pMouseEvent )
{
if (m_dialMode == QDialMode) {
QDial::mouseMoveEvent(pMouseEvent);
return;
}
if (!m_bMousePressed)
return;
const QPoint& posMouse = pMouseEvent->pos();
int xdelta = posMouse.x() - m_posMouse.x();
int ydelta = posMouse.y() - m_posMouse.y();
double angleDelta = mouseAngle(posMouse) - mouseAngle(m_posMouse);
int iNewValue = value();
switch (m_dialMode) {
case LinearMode:
iNewValue = int(m_lastDragValue + xdelta - ydelta);
break;
case AngularMode:
default:
// Forget about the drag origin to be robust on full rotations
if (angleDelta > +180.0) angleDelta = angleDelta - 360.0;
if (angleDelta < -180.0) angleDelta = angleDelta + 360.0;
m_lastDragValue += double(maximum() - minimum()) * angleDelta / 270.0;
if (m_lastDragValue > double(maximum()))
m_lastDragValue = double(maximum());
if (m_lastDragValue < double(minimum()))
m_lastDragValue = double(minimum());
m_posMouse = posMouse;
iNewValue = int(m_lastDragValue + 0.5);
break;
}
setValue(iNewValue);
update();
emit sliderMoved(value());
}
